Millimeter to Chain Converter (and vice versa)

Created by: tinycalcs.com/en
Number of supported units: 2
Last update: 2026

This converter allows you to convert millimeters [mm] to chains [ch] or chains [ch] to millimeters [mm]. Calculations are performed in both directions. The calculation result and the entered value are displayed with up to 20 decimal places for maximum accuracy.

1 millimeter [mm] ≈ 4.971 * 10-5 chains [ch]1 chain [ch] = 20,116.8 millimeters [mm]

Convert millimeters to chains

There are two simple ways to convert millimeters [mm] to chains [ch]. In the first calculation method, the value in millimeters [mm] is divided by 20,116.8. The second method multiplies the value in millimeters [mm] by the rounded conversion factor of 4.971 * 10-5.

  • Chains [ch] = millimeters [mm] ÷ 20,116.8
  • Chains [ch] ≈ millimeters [mm] * 4.971 * 10-5

The calculation method with a rounded conversion value is more suitable for rough conversions from millimeters [mm] to chains [ch], as the calculation result may contain rounding errors. Therefore, the variant with the exact conversion factor is more suitable.


Convert chains to millimeters

Converting chains [ch] to millimeters [mm] is easy and can be done in two ways. The first method involves multiplication, whereby the value in chains [ch] is multiplied by 20,116.8. The second variant is a division. Here, the value in chains [ch] is divided by the rounded conversion factor of 4.971 * 10-5.

  • Millimeters [mm] = chains [ch] * 20,116.8
  • Millimeters [mm] ≈ chains [ch] ÷ (4.971 * 10-5)

The rounded conversion value can cause rounding errors, resulting in inaccurate calculation results. To ensure that the conversion from chains [ch] to millimeters [mm] produces the most accurate calculation result possible, the conversion should be performed using the exact conversion factor.

Converter

Decimal places

How it's calculated

Factor: 
20,116.8
Millimeters=Chains*20,116.8
Chains=
Millimeters20,116.8

To all available units

Millimeters

Decameters

Millimeters

Decimeters

Millimeters

⅛ Inches

Millimeters

Eighth miles

Millimeters

Exameters

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